849718459 has 4 divisors (see below), whose sum is σ = 852618816. Its totient is φ = 846818104.

The previous prime is 849718453. The next prime is 849718477. The reversal of 849718459 is 954817948.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 849718459 - 2³ = 849718451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849718451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1449739 + ... + 1450324.

It is an arithmetic number, because the mean of its divisors is an integer number (213154704).

Almost surely, 2^849718459 is an apocalyptic number.

849718459 is a deficient number, since it is larger than the sum of its proper divisors (2900357).

849718459 is a wasteful number, since it uses less digits than its factorization.

849718459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900356.

The product of its digits is 2903040, while the sum is 55.

The square root of 849718459 is about 29149.9306860239. The cubic root of 849718459 is about 947.1636394222.

The spelling of 849718459 in words is "eight hundred forty-nine million, seven hundred eighteen thousand, four hundred fifty-nine".